Heat transfer device



June 16, 1931. D. s. JACOBUS 1,810,178

HEAT TRANSFER DEVICE Original Filed Sept 4, 1918 3 Sheets-Sheet l i cl INVENTOR ,M% W ATTORNEYS.

Jun 16, 1931.

D. S. JAC OBUS HEAT TRANSFER DEVICE Original Filed Sept. 4. 1918 3 Sheets-Sheet 2 if T24- INYENTOR 5 BY W i v ATTORNEYS June 1 6, 1931.

D. s. JACOBUS 1,810,178

HEAT TRANSFER DEVICE 3 Shets-Sheet 3 Original Filed Sept. 4, 19 8 (INVENTOR Li E being taken on the line 3-3 pending application,

September 4:, 1918, which has since matured comprises a Patented June 16, 1931 DAVID S. JACOBUS, OF MONTCLAIR, NEW JERSEY, WILCOX COMPANY, .OF BAYONNE, NEW JERSEY, A

,ASSIGN'OR rv THE IBAJ-BCOCK a oonrona'rron or new messy HEAT TRANSFER nnvion Original application filed. September is a divisionof my co- This application Serial No. 252,550, filed into Patent No. 1,729,259 dated September The invention relates to a novel and improved form of heat transfer device shown herein in connection with an economizer structure, andthe novel features will be best understood. from the following description and the annexed drawings, in which a selected embodiment of the invention is shown, and in which;

Fig. 1 is a sectional side elevation of an economizer having my invention applied thereto.

.Fig. 2 is a vertical sectional view through the economizer appearing in Fig. 1.

Fig. 3 is a detailed view showing fragmentary portions of headers and tubes constructed according to the invention, this view of Fig. 4. V V -Fig. 4 is a view taken on theline 4-4: of Figs. 3 and 5. v Fig. 5 is a'view corresponding to Fig. 3, but showing another form which the inven tion may take.

Referring now to the drawings, I have illustrated the invention as applied to an economizer, here shown as disposed above a boiler, the drum of which is shown at 1.v

The hot gases after passing over the heat absorbing surfaces of the a flue 2 to an GCOHOIHIZBI 3, from which they are discharged by a fan 4 into a flue 5.

The invention is shown as used in connection with a double boiler, which has a second steam and water drum 1 from which the hot gases flow upwardly to a fine 2, and are discharged through a second economizer disposed back of the economizer 3, and finally pass out of a flue 5. The heat transfer device exemplified by the economizer, plurality of sections arranged side by side. Each of these sections is shown as having a pair of headers 6 disposed substantially parallel to each other, and on the opposite sides of the gas pass through the economizer. In the form shown, the headers boiler pass through may be 4., 1918, Serial No. 252,550. Dividedand this application filed June 22, 1929. Serial No. 372,940.

aredi'sposed parallel to the direction of-flow of the gases. I I

Connectlng the headers o'f'each pair is plurality of tubes 7 which, as plainly shownv in Fig. 2, form a continuousbank across the In this bank it will be seen that the tubes are substantially-uniformly spaced. The headers 6are shown spaced apart, thus" gas pass.

decreasing the weight of metalrequired for headers, and this spacing may be of an amount sufficient to provide for theremoval of tubes, as plainly shown in Figs. 3 4 and 5. In these views the headers are SlOWIl as spaced apart a distance greater than a tube diameter, so that individual tubes indicated at 7, ma 'be removed between theheaders.

Each eader is provided with a flatwall portion 8 extending longitudinally thereof, and this flat ,wall portion 8 is provided with sets of holes. Each set is disposed in a band extending transversely to the length of the header, and in this illustration each set is seen to comprise two holes, into which tubes are entered. The sets are shown as being spaced apart uniformly, lengthwise of the headers, and this spacing may be the same .as the spacing between the adjacent tubes in wall'portlon normal thereto. In'this arrange.- ment the tubes are brought close enough together to be secured to relatively small headers, while the major portions of the tubes are spaced further apart. The result is that the weight of metal needed for the headers is greatly reduced, and atthe same time space provided for'the removal and insertion of tubes between the headers.

{Referring now to Fig. 5, an arrangement somewhat similar'to'that of Fig. 3- is shown, except that here the tubes which are bent'at their ends, are provided with portions 11 which enter the holes" in the wall portions ofthe-headers at anang'le to the normal. In

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both forms shown, as will be seen in Fig. 4, the sets of holes form a plurality of longitudinal rows extending lengthwise of the headers, and in these longitudinal rows alternate holes are used to receive atube which is unbent at its end, and the other alternate holes are used to receive tubes which are bent. at their ends. The result is that the tubes in successive sets are, staggered with respect to each other. The headers are provided with openings 12 having a suitable closure 13, and these openings are so arranged that access-to thetubes can be had, as plainly shown in Fig. 4. V

The headers are arranged in groups, as shown in Fig. 1. The headers at the endof each group are connected to watercompartments 14, and the water compartments ofadjacent groups are connected by pipes 15. Suitable pipes 16 connect .eachwater compartment to the-end portions, of adjacent cups of headers. 'lVater is supplied t rough aninlet 17, and afterpassing through the various-groups of sections, leaves at an outlet 18.

1. In a heat transfer device, a plurality of sections arranged-side by side, each section having a pair of headers with longitudinally extending fiat wall portions pro- Vided with sets of holes, each arranged in a transversely extendingband, tubes secured-in said-holes-and connecting the two headers of each pair, atleastsome of said tubes being bent at their ends to enter said holes, the headers of adjacent sections being spaced apart and the tubes of the sections forming a bank, the tubes in the bank being spaced substantially uniformly across thebank in a direction transverse to the length of said headers,--a compartment common to a, group of headers ,at each endof the sections, and pipes connecting the end portions of said headersto. said compartment.

2. In a heattransfer device, aplurality of sections arranged side .by side, each section having a pair of headers with longitudinally extending .fiat wall portions provided with sets of holes each arranged in atransversely extending band, tubes secured in said holes and connectingthetwo headers of eachpair, atleastsome of said tubes being bent at their ends toventersaid holes,the headers of adj acentsections'being spaced apart a distance greater thanatubediameter and the tubes of the sections forming abank, the tubes int-he bank being spaced substantially uniformly across the bankin a direction transverse to the length of saidheaders, acompartment common to atgroupof headersateachend of the sections, and pipes connecting the end portions of said headersto'said compartment.

3. In aheat transfer device, a plurality of sections arrangedside by side, each section having apair of headers with longitudinally extending flat wall portions provided with sets of holes each arranged in a transversely extending band, tubes secured in said holes and connecting the two headers of each pair, at least some of said tubes .being bent at their ends to enter said holes, the headers of adjacent sections being spaced apart, the nest of tubes connecting each pair of headers being wider than the outside dimension of one of said headers, a compartment common to a group of headers at each end of the sections, and pipes connecting the end portions of said headers to said compartment.

4. In a heat transfer device, a plurality of sections arranged side by side, each section having a pair of headers with longitudinally extending fiat wall portions provided :with

the sections, and pipes connecting the end portions of said headers to said compartment.

5. In a heat transfer dcvice,, a plurality of sections arranged side by side, each section having a pair of headers with longitudinally extending flat wall portions provided with sets of holes each arranged in a transversely extending band, tubes secured in said holes and connectlng the twoheaders of each pair,

at least some of said tubes being bent at their ends-to enter said holes and the othertubes having their ends unbent, the headers of adjacent sections being spaced apart and the tubes of the sections forming a bank, the tubes in the bank being spaced substantially uniformly across the bank in a direction transverse to the length of said headers, a compartment common to a group of headers at each end of the sections, and pipes connecting the end portions of said headers to said compartment.

6. In a heat transfer device, a plurality of sections arranged side by side, each section having a pair of headers with longitudinally extending fiat wall portions provided with sets of holes each arranged in a transversely extending band, tubes secured in said holes and connecting the two headers of each pair, at least some of said tubes being bent at their ends to entersaid holes at an angle-to the normal to said wall portion, the headers of adjacent sections being spaced apart and the tubes of the sections forming a bank, the tubes in the bank being spacedsubstantially uniformly across the bank in a direction transverse to the length of said headers, a

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compartment common to a group of headers at each end of the sections, and pipes connecting the end portions of said headers to said compartment.

7. In a heat transfer device, a plurality of sections arranged sideby side, each section having a pair of headers of rectangular cross section,one ofthe Walls of each header being provided with sets of holes, each arranged in a transversely extending band, tubes secured in said holes and connecting the two headers of each pair, at least some of said tubes being bent at their ends to enter said holes, the headers of adjacent sections being spaced apart and the tubes of the sections forming a bank, the nest of tubes connecting each pair of headers being wlder than the outside dimension of one of said headers, a water COHI-V to each of said groups of headers,

bank of tubes extendingacross said pass and having the tubes therein secured 1n sald holes to connect the headers of opposite groups, at I least some of said'tubes being bent at at least one end to enter said holes, adjacent headers being spaced apart, a compartment common and pipes connecting the end portions of said headers to said compartment.

7 DAVID S. JAOOBUS.

in said holes and connecting the two headers of each pair, at least some of said tubes being bent at their ends to enter said holes, the headers of adjacent sections being spaced apart and the tubes of 'the sections forming a bank, a water compartment common to a group of headers at each end of the sections, pipes connecting the end portions of said headers to said compartment, and means causing hot gases to flow across said tubes, the spacing of said tubes being substantially uniform across the gas stream.

9. In a heat transfer device, a plurality of sections arranged side by side, each section having a pair of headers of rectangular cross section, one of the walls of each headerbeing provided with sets of holes, each arranged in a transversely extending band, tubes secured in said holes andconnecting the two headers of each pair, at least some of said tubes being bent at their ends to enter said holes, the headers of adjacent sections being spaced apart and the tubes of the sections forming-a bank, a water compartment common to a group of headers at each end of the sections, pipes connecting the end portions of said i headers to said compartment, and means causing hot gases tofiow across said tubes, the

spacing of said tubes being substantially uni form across the gas stream and in the direction of flow of said stream.

10. A heat transfer device comprising groups of headers disposed on opposite sides of a gas pass, the headers of both groups having fiat wall portions provided with sets of holes, each arranged in a transverse band of said wall portion, a substantially continuous 

